Foraminal lumbar disc protrusion
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Right-sided foraminal lumbar disc protrusion compressing only the exiting nerve root and not narrowing the subarticular recess.
A selected image from a different level of the same patient demonstrating normal anatomy, with the exiting nerve root surrounded by fat.
Disc projecting into the right neural-exit foramen and compressing the exiting nerve root in this case is relatively easy to overlook if foraminal disc protrusions are not actively sought.